Convert a file to its byte source equivalent

to-byte-source.js

const fileName = Deno.args[0];

if(!fileName) {
  console.error('No file provided.');
  Deno.exit(1);
}

let file = await Deno.open(fileName);
let encoder = new TextEncoder();

await Deno.stdout.write(encoder.encode('new Uint8Array(['));

let first = true;
let buf = new Uint8Array(100);
let numOfByteRead = await Deno.read(file?.rid, buf);
while(numOfByteRead) {
  let text = '';
  for(let i = 0; i < numOfByteRead; i++) {
    if(!first) {
      text += ', ';
    } else {
      first = false;
    }
    text += buf[i];
  }
  await Deno.stdout.write(encoder.encode(text));
  buf = new Uint8Array(100);
  numOfByteRead = await Deno.read(file?.rid, buf);
}

await Deno.stdout.write(encoder.encode(']);'));